Worked on reliability improvements for multi-DataSource configurations in the spring-projects/spring-boot repository, focusing on preventing misconfigurations in complex setups. Addressed a bug related to data source configuration correctness by refactoring the underlying logic and updating configuration samples, ensuring that applications using multiple data sources in Spring Boot are less prone to setup errors. The approach involved clarifying documentation and aligning code samples to support consistent future changes. Utilized Java and Kotlin within the Spring Boot framework, applying data access expertise to enhance maintainability and reduce risk for downstream applications. The work emphasized robust configuration and clear guidance for developers.